Question 1.
Where is the deepest mine in the world located?
(a) South America
(b) South Africa
(c) South India
(d) South Australia
Answer
Answer: (b) South Africa
Question 2.
The depth of the deepest mine in South Africa is
(a) one km
(b) two km
(c) three km
(d) four km
Answer
Answer: (d) four km
Question 3.
The upper most layer of the earth’s surface is called
(a) the crust
(b) the brust
(c) the roads
(d) the forest
Answer
Answer: (a) the crust
Question 4.
What is the radius of the earth?
(a) 3671 km
(b) 7163 km
(c) 6371 km
(d) 1736 km
Answer
Answer: (c) 6371 km
Question 5.
Any natural mass of mineral matter that makes up the earth’s crust is called a
(a) rock
(b) road
(c) sediment
(d) none of these
Answer
Answer: (a) rock
Question 6.
The sediments are transported and deposited by
(a) wind
(b) water
(c) wind and water
(d) none of these
Answer
Answer: (c) wind and water
Question 7.
The process of transformation of the rock from one form to another is known as
(a) road cycle
(b) food cycle
(c) rock cycle
(d) all of these
Answer
Answer: (c) rock cycle
Question 8.
Which rock is the molten magma made up of?
(a) Igneous
(b) Metamorphic
(c) Sedimentary
(d) None of these
Answer
Answer: (a) Igneous
Question 9.
What is the latin term of Igneous?
(a) Ignis
(b) Sedimentum
(c) Metamorphose
(d) None of these
Answer
Answer: (a) Ignis
Question 10.
Rocks which contain fossils are called
(a) metamorphic rocks
(b) igneous rocks
(c) core
(d) sedimentary rocks
Answer
Answer: (d) sedimentary rocks
Match the contents of Column A with that of Column B.
| Column A | Column B |
| 1. Sial | (a) Extrusive igneous rocks |
| 2. Sima | (b) Intrusive igneous rocks |
| 3. Nife | (c) Metamorphic rocks |
| 4. Basalt | (d) Silica and Alumina |
| 5. Granite | (e) Silica and Magnesium |
| 6. Slate and Marble | (f) Nickel and Ferrous |
Answer
Answer:
| Column A | Column B |
| 1. Sial | (d) Silica and Alumina |
| 2. Sima | (e) Silica and Magnesium |
| 3. Nife | (f) Nickel and Ferrous |
| 4. Basalt | (a) Extrusive igneous rocks |
| 5. Granite | (b) Intrusive igneous rocks |
| 6. Slate and Marble | (c) Metamorphic rocks |
Fill in the blanks with appropriate words:
1. Lava is the molten magma from ……….. of the earth’s surface.
Answer
Answer: interior
2. Like a …………. the earth is made up of …………. layers.
Answer
Answer: onion, concentric
3. Crust is about ………….. km on the continental mass and ………….. km on the ocean floor.
Answer
Answer: 35 and 5
4. The mantle makes up _______ % of the Earth by volume.
Answer
Answer: 57%
5. Core has a radius of about ………….. km and has very high temperature and ………..
Answer
Answer: 3500, pressure
6. Limestone under excessive heat and pressure changes into ………….
Answer
Answer: marble
State whether the given statements are true or false:
1. Crust is the thickest of all the layers.
Answer
Answer: False
2. Core is the innermost layer of the earth.
Answer
Answer: True
3. Mantle extends up to the depth of 2900 km.
Answer
Answer: True
4. The loose sediments are hardened to form metamorphic rocks.
Answer
Answer: False
5. Deccan plateau is made up of basalt.
Answer
Answer: True
6. Fossils are remains of dead plants and animals.
Answer
Answer: True